In the 1970s and 1980s, ancestral graves were moved to the village, and my grandfather insisted on acupuncture according to ancient methods. On the night of moving the grave, the black dog barked and seven upside-down copper coins were found under the coffin. The second uncle who was keeping vigil at night was suddenly possessed by an evil spirit, and cried in the voice of his grandfather that the ancestral grave could not be moved. The Feng Shui compass rotated crazily, pointing in the direction of the mass graves in the back mountain.